From: Scott McNutt <smcnutt@psyent.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] CFI Driver Problem: flash not ready
Date: Sun, 19 Oct 2008 17:59:02 -0400 [thread overview]
Message-ID: <48FBADA6.3090505@psyent.com> (raw)
In-Reply-To: <20081019195142.C34DC832E43A@gemini.denx.de>
Hi Wolfgang,
> Why the heck does flash_is_busy() return 0 when the flashobviously is
> still busy?
Does this use the toggle bit detection? I saw the same symptoms
with Nios II. Basically, the memory controller was reading the
16-bit flash twice to obtain a full 32-bit word, then returning just
the first 16-bits. So, I would never see the toggle bit changing.
Not sure if this is similar to your situation ... but it was a real
pain-in-the-butt to finally understand what was happening in my
situation.
Regards,
--Scott
next prev parent reply other threads:[~2008-10-19 21:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-19 19:51 [U-Boot] CFI Driver Problem: flash not ready Wolfgang Denk
2008-10-19 21:59 ` Scott McNutt [this message]
2008-10-19 22:10 ` Wolfgang Denk
2008-10-23 23:26 ` Wolfgang Denk
2008-10-20 8:00 ` stefano babic
2008-10-23 2:20 ` Ross Morley
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